A. Serves as a protein channel that signals other molecules B. Removes large waste particles from the cytoplasm of the cell

C. Breaks down a chemical messenger to cause a reaction inside the cell

D. Uses ATP to move molecules against the concentration gradient

Using the periodic table, determine which material is most likely a good conductor

Molecular models of two different substances are shown below. in the molecule on the left, the oxygen atom pulls on electrons more strongly than the hydrogen atoms. in the molecule on the right, the two oxygen atoms pull on the shared electrons with the same strength. water molecule, h,o oxygen molecule, oz when the two substances are put in the same container, they do not attract each other. why does this happen? a. they both contain oxygen. b. one is polar and one is nonpolar. c . they are both polar. d. they contain different elements.

Will mark brainliest. (20 points) many have pigments structures known as eyespots that detect direction of light. a. b. archaebacteria c. protists d. none of the above